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[IEE. Image enhaced endoscopy. ¿µ»óÁõ°­³»½Ã°æ] - ðû

Image enhanced endoscopy´Â ±¤ÇÐÀûÀ¸·Î ȤÀº ÀüÀÚÀûÀ¸·Î ÀÏÁ¤ ÆÄÀ常 ÀÌ¿ëÇÏ¿© °°Àº º´¼Ò¸¦ ´Ù¸¥ »öÁ¶·Î °üÂûÇÏ´Â ±â¼úÀÔ´Ï´Ù. ¸»ÇÏÀÚ¸é »ö¾È°æÀÌÁö¿ä. ¾î¶² Áúº´Àº »ö¾È°æÀ» ³¢°í º¸¸é ´õ Àß º¸ÀÔ´Ï´Ù.

Image-enhanced endoscopy (IEE)
Conventional chromoendoscopyVirtual chromoendoscopy
Dye-basedEquipment-based
Contrast: indigocarmine
Absorptive: crystal violet
Optical: NBI (Olympus)
Electronic: FICE, i-scan
Others: BLI, LCI (Fujifilm)
Pit patternCapillary pattern

»ö¼Ò³»½Ã°æÀ» ÀÌ¿ëÇÑ Kudo ºÐ·ù´Â pit patternÀ» º¸´Â °ÍÀÌ°í, NBI µîÀ» ÀÌ¿ëÇÑ Sano ºÐ·ù´Â capillary patternÀ» º¸´Â °ÍÀÔ´Ï´Ù. Hiroshima, NICE, JNETÀº capillary patternÀ» ÁÖ·Î º¸¸é¼­ surface patternÀ» Á¶±Ý ÂüÁ¶ÇÏ´Â ¹æ¹ýÀÔ´Ï´Ù.

Pit´Â intestinal glandÀÇ openingÀÔ´Ï´Ù. IndigocarmineÀ» ºÐ¹«Çϸé dye°¡ pit¿¡ °íÀ̹ǷΠpit°¡ °Ë°Ô º¸ÀÔ´Ï´Ù. Crystal violet ¿°»öÀ» Çϸé pit ÁÖº¯ »óÇǼ¼Æ÷ÀÇ ÇÙÀÌ ¿°»öµÇ¹Ç·Î pit ÀÚü´Â ÇϾé°Ô º¸ÀÔ´Ï´Ù.


[2024-7-6] IDEN Ư°­¿¡¼­ Á¦½ÃµÈ °á·ÐÀÔ´Ï´Ù. ¼øõÇâ´ëÇÐ ±³¼ö´Ô.

New Image Enhanced Endoscopy
LCILCI is superior to WLI in detecting adenoma and SSL.
LCI is not infereior to NBI in detecting SSL.
LCI may help predict mucosal healing in UC.
RDIRDI enhances visibility of bleeding points, aiding endoscopic hemostasis.
RDI may help assess UC severity.
TXITXI enhances lesion visibility compared to WLI, improving diagnostic accuracy.
TXI improves ADR and PDR over WLI, especially for small lesions.


1. NBI (narrow band imaging) by Olympus

YouTube

OlympusÀÇ NBI´Â ÁÖ·Î µÎ ÆÄÀåÀ» ÀÌ¿ëÇÕ´Ï´Ù. 415 nm´Â Ç¥¸é°ú °¡±î¿î capillary¿¡ ÀÇÇÏ¿© Èí¼öµÇ´Â ÆÄÀåÀÌ°í, 541 nm´Â Á» ´õ ±íÀº submucosal vessel¿¡ Èí¼öµÇ´Â ÆÄÀåÀÔ´Ï´Ù. Áï ¾ÆÁÖ °¡´Â Ç÷°üµéÀÌ °Ë°Ô º¸Àδٴ Ư¡À» °¡Áö°í ÀÖ½À´Ï´Ù. NBI¸¦ ÄÒ »óÅ¿¡¼­ È®´ë³»½Ã°æÀ¸·Î º¸¸é ¹Ì¼¼ ±¸Á¶¸¦ ¾ÆÁÖ Àß °üÂûÇÒ ¼ö ÀÖ½À´Ï´Ù. Olympus ³»½Ã°æ »çÁøÀº »ç°¢ÇüÀÇ ±ÍÅüÀ̸¦ ¾à°£ Á¢Àº µíÇÑ 8°¢Çü ¸ð¾çÀÔ´Ï´Ù. 8°¢Çü Å׵θ®ÀÇ ³»½Ã°æ »çÁøÀÌ brown color·Î º¸À̸é Olympus NBIÀÔ´Ï´Ù.

È®´ë³»½Ã°æÀÌ ¾Æ´Ñ ÀϹݳ»½Ã°æ¿¡¼­ NBI°¡ À¯¿ë¼ºÀÌ ÀÖ´ÂÁö´Â ´Ù¼Ò ºÒ¸íÈ®ÇÕ´Ï´Ù. ´ëÀåÀÇ °æ¿ì Sano capillary pattern classificationÀº È®´ë³»½Ã°æÀ» ÀüÁ¦·Î Àû¿ëÇÑ °ÍÀÎ ¹Ý¸é, NICE ºÐ·ù´Â È®´ë³»½Ã°æÀÌ ¾Æ´Ñ ÀÏ¹Ý ³»½Ã°æÀ» ÀüÁ¦·Î ¸¸µé¾îÁø ¹æ¹ýÀÔ´Ï´Ù.

NICE ºÐ·ù. Capillary patternÀ» ÁÖ·Î º¸¸é¼­ »öÁ¶³ª surface patternÀ» °üÂûÇÏ´Â ¹æ¹ýÀÔ´Ï´Ù. NICE II´Â Sano II-IIIA¿Í ºñ½ÁÇÏ°í NICE III´Â Sano IIIB¿Í ºñ½ÁÇÕ´Ï´Ù.

±×·¯³ª ½ÇÁ¦·Î È®´ë³»½Ã°æÀÌ ¾Æ´Ñ ÀϹݳ»½Ã°æÀ¸·Î NBI ¿µ»óÀ» °üÂûÇغ¸¸é Ãß°¡ÀûÀ¸·Î ¾òÀ» ¼ö ÀÖ´Â Á¤º¸´Â °ÅÀÇ ¾ø°Å³ª ¾ÆÁÖ Á¦ÇÑÀûÀÔ´Ï´Ù. ´ëÀå¿¡¼­´Â ±×³ª¸¶ ¾ÆÁÖ ¾à°£ µµ¿òÀÌ µÇ´Âµ¥ À§¿¡¼­´Â °ÅÀÇ µµ¿òµÇÁö ¾Ê´Â °Í °°½À´Ï´Ù.

Ãß°¡ÀûÀÎ Á¤º¸¸¦ ¾òÀ» ¼ö ÀÖ½À´Ï±î?

ÀϹݳ»½Ã°æµµ ¾Æ´Ï°í È®´ë³»½Ã°æµµ ¾Æ´Ñ 290HQ ³»½Ã°æÀÇ Near focus¿¡¼­ NBI°¡ À¯¿ëÇÑÁö¿¡ ´ëÇÑ ÁÁÀº ¿¬±¸ °á°ú¸¦ º¸Áö ¸øÇß½À´Ï´Ù. Near focus´Â È®´ë³»½Ã°æº¸´Ù´Â ¸øÇÏÁö¸¸ ÀϹݳ»½Ã°æº¸´Ù´Â µµ¿òµÇ´Â °Í °°´Ù´Â °ÍÀÌ Á¦ ´À³¦ÀÔ´Ï´Ù.

¿äÄÁµ¥ ¹ß°ßÀ» À§Çؼ­´Â white light endoscopy°¡ À¯¿ëÇÏ°í NBI¿Í °°Àº IEE´Â characterizationÀ» À§ÇØ »ç¿ëÇÏ´Â °ÍÀε¥ ±× À¯¿ë¼ºÀº È®´ë³»½Ã°æ¿¡¼­ ÃÖ´ëÀÔ´Ï´Ù.


[2018-1-12. º¯Á¤½Ä]

First generation NBIÀÇ adenoma detection rate´Â white light endoscopy¿Í Â÷ÀÌ°¡ ¾ø¾ú½À´Ï´Ù. ¾Æ¸¶µµ ¿µ»óÀÌ ¾îµÓ±â ¶§¹®ÀÏ °ÍÀ¸·Î »ý°¢ÇÕ´Ï´Ù. New version NBI´Â double exposure of blue light·Î ÀÎÇÏ¿© ¿µ»óÀÌ ¹à¾ÆÁ³°í, ±× ¼ºÀûÀÌ ´Ù¼Ò Çâ»óµÈ °Í °°½À´Ï´Ù (Horimatsu T. Int J Colorectal 2015). ±×·¯³ª ÀÌ ¿¬±¸´Â NBI ±º¿¡¼­ withdrawal timeÀÌ ±æ¾ú±â ¶§¹®¿¡ bias °¡´É¼ºÀÌ ÀÖ½À´Ï´Ù.


2. FICE by Fujinon

FICE (Fuji Intelligent Color Enhancement)´Â septral endoscopyÀÔ´Ï´Ù. »çÁø À̹ÌÁö¸¦ spectrumÀ¸·Î ³ª´« ÈÄ ¸î °³´Â ¹ö¸®°í ¸î °³¸¸ ³²°Ü¼­ »õ·Î¿î image¸¦ ¸¸µå´Â °ÍÀÔ´Ï´Ù. ½ÇÁ¦ filter´Â ¾ø´Âµ¥ filter¸¦ »ç¿ëÇÏ´Â °Í°ú ºñ½ÁÇÑ È¿°ú¸¦ ³ë¸®´Â °ÍÀÔ´Ï´Ù. µû¶ó¼­ spectrum ¼±ÅÃÀ» ÀÚÀ¯·Ó°Ô ÇÒ ¼ö ÀÖ½À´Ï´Ù. 10°³ Á¤µµ Á¤ÇØ ³õ°í ÀÌ°Í Àú°Í »ç¿ëÇÏ´Â ºÐÀÌ ¸¹½À´Ï´Ù.

Fujinon ³»½Ã°æ »çÁøÀº À§ ¾Æ·¡°¡ ©¸° ¿øÀÔ´Ï´Ù. À§ ¾Æ·¡°¡ ©¸° ¿øÇü ³»½Ã°æ »çÁøÀÌ Æò¼Ò¿Í ´Ù¸¥ »ö±ò·Î º¸À̸é Fujinon FICEÀÔ´Ï´Ù.


3. LCI (linked color imaging), BLI (blue lase imaging) by Fujifilm

LCI mode¿¡¼­ 'red in purple' ¼Ò°ßÀ» ÅëÇØ º´¼Ò¸¦ ¹ß°ßÇÏ°í BLI-magnificationÀ¸·Î characterization ÇÏ´Â ¼ø¼­·Î °Ë»çÇÕ´Ï´Ù. Yamamoto ¼±»ý´ÔÀº WLE¸¦ »ç¿ëÇÏÁö ¾Ê°í óÀ½ºÎÅÍ LCI mode·Î °Ë»çÇÑ´Ù°í ÇÕ´Ï´Ù.


[LCI]

LCI mode´Â color processingÀ» ÅëÇÏ¿© color contrast¸¦ Áõ°¡½ÃÅ°´Â ¹æ½ÄÀÔ´Ï´Ù. ÀÚ¿¬½º·¯¿î »ö»óÀ» À¯µµÇϸ鼭 ºÓÀº »öÀº ´õ ºÓ°Ô, ³ë¶õ »öÀº ´õ ³ë¶þ°Ô º¸ÀÌ°Ô ¸¸µì´Ï´Ù.

¿°ÁõÀº purple·Î, Á¾¾çÀº red·Î º¸ÀÔ´Ï´Ù ("red in purple").


[BLI]

BLI mode´Â ±âÁ¸ÀÇ blue wave¿¡ Ãß°¡µÈ Çù´ë¿ª ´ÜÆÄÀåÀÇ blue-violetÀÌ Ç¥¸é¿¡ °¡±î¿î ÀÛÀº Ç÷°ü¿¡ Èí¼öµÇ¾î Ç¥¸éÀÇ contrast°¡ °­Á¶µÇ´Â ¿ø¸®ÀÔ´Ï´Ù. Olympus »çÀÇ NBI¿Í À¯»çÇÑ »ö»óÀÌ µË´Ï´Ù. BLI´Â ´Üµ¶À¸·Îµµ À¯¿ëÇÏÁö¸¸ magnificationÀ» ÇØ¾ß ±× ÀåÁ¡ÀÌ ¸íÈ®ÇØÁý´Ï´Ù. (Âü°í: BLIÀÇ ¿ø¸® - PDF)

BLI´Â white light endoscopyÀÇ image¸¦ spectrumÀ¸·Î ³ª´©¾î À籸¼ºÇÏ¿© º¸¿©ÁÖ´ø FICE¿Í´Â ´Þ¸® white light¿¡ Çù´ë¿ª´ÜÆÄÀå(blue-violet)À» Ãß°¡ÇÏ¿© ¿µ»óÁ¤º¸ ¼Õ»óÀÌ ¾øÀÌ ±×´ë·Î º¸¿©ÁÖ´Â ¹æ½ÄÀÔ´Ï´Ï´Ù. Fujifilm»ç¿¡¼­µµ FICE´Â ´õ ÀÌ»ó È«º¸ÇÏÁö ¾Ê°í BLI·Î ¿Å°Ü°£ ÀλóÀÔ´Ï´Ù.

Integrated light source¸¦ º¸¸é R, G, B ÀÌ¿Ü¿¡ Á¦4ÀÇ ±¤¿ø(Çù´ë¿ª ´ÜÆÄÀå, blue-violet)ÀÌ Ãß°¡µÇ¾î ÀÖÀ½À» ¾Ë ¼ö ÀÖ½À´Ï´Ù.

Çù´ë¿ª ´ÜÆÄÀåÀÎ blue-violet¸¸ Ãß°¡µÈ °ÍÀÌ BLIÀÌ°í, blue-violetµµ ´õÇÏ°í blue waveµµ ¾çÀ» ´Ã¸° °ÍÀÌ BLI-brightÀÔ´Ï´Ù.

Çù´ë¿ª ´ÜÆÄÀå blue-violet ¾ÆÁÖ Ç¥¸é¿¡ °¡±î¿î Ç÷°ü¿¡ Èí¼öµË´Ï´Ù.

BLI´Â magnificationÀ» ÇÏ¿´À» ¶§ °¡Àå È¿°úÀûÀÔ´Ï´Ù. (A). White-light mode. Protruding tumor measuring 18 mm shows an irregular surface in a plain image. (B) BLI mode. Magnified view shows an irregular vascular pattern and an avascular area can be seen partially. Surface pattern also shows irregularity. These finding definitely indicates substantially invasive cancer. (Therap Adv Gastroenterol. 2016)

* Âü°í: Linked Color Imaging and Blue Laser Imaging for Upper Gastrointestinal Screening a href="https://pubmed.ncbi.nlm.nih.gov/30384402/">Clin Endosc 2018

* Âü°í: The role of linked color imaging in endoscopic diagnosis of Helicobacter pylori associated gastritis Scand J Gastroenterol 2020


[2018-8-26 ³»½Ã°æ¼¼¹Ì³ª ·±Ãµ, Jichi ´ëÇÐ Hiroyuki Osawa ¼±»ý´Ô °­ÀÇ]

Á¶±âÀ§¾ÏÀº green background (=intestinal metaplasia)¿¡ µÑ·¯½×ÀÎ brown area·Î °üÂûµË´Ï´Ù.

Helicobacter´Â »ì±¸»ö(apricot)À¸·Î °üÂûµË´Ï´Ù.


4. i-Scan

i-SCANÀº contrast enhancement, surface enhancement, tone enhancement¸¦ ÀûÀýÈ÷ Á¶ÇÕÇÏ¿© image¸¦ ¸¸µç´Ù°í ÇÕ´Ï´Ù. ±â¼úÀûÀÎ detailÀ» ÀÌÇØÇϱâ´Â ¾î·Æ½À´Ï´Ù¸¸, ÀϺδ softwareÀû ¹æ¹ýÀÌ°í ÀϺÎ(optical enhancement)´Â filter¸¦ »ç¿ëÇÑ hardwareÀûÀÎ ¹æ¹ýÀÎ °Í °°½À´Ï´Ù. ¿©ÇÏÆ° ¼¼°³ÀÇ mode°¡ ÀÖ½À´Ï´Ù.


[FAQ]

[2020-8-16. ³»½Ã°æÇÐȸ ¼¼¹Ì³ª]

2020³â 8¿ù 16ÀÏ ³»½Ã°æÇÐȸ¼¼¹Ì³ª°¡ hybrid ¹æ½ÄÀ¸·Î ÁøÇàµÇ¾ú½À´Ï´Ù.

2020-8-16. ÀÏ»êŲÅýº Off-line ¼¼¹Ì³ª ÇöÀå »çÁø

2020-8-16. ³»½Ã°æ¼¼¹Ì³ª. On-lineÀ¸·Î Á¢¼ÓÇÑ È­¸é

Q and A´Â ZoomÀ» ÀÌ¿ëÇÑ È­»óȸÀÇ Çü½ÄÀ̾ú½À´Ï´Ù. Çà»ç´Â ÀÏ»ê ŲÅýº¿¡¼­ ÁøÇàµÇ¾ú°í Àú´Â ÀÏ¿øµ¿ ±³¼ö¿¬±¸½Ç¿¡¼­ ´äÇߴµ¥¿ä... Image-enhanced endoscopy (IEE)°¡ ¾ÏÁø´ÜÀ² Çâ»ó¿¡ µµ¿òÀÌ µÇ´ÂÁö Áú¹®ÀÌ À־ ´ÙÀ½°ú °°ÀÌ ´äÇÏ¿´½À´Ï´Ù.

"IEE´Â white light endoscopy·Î ¹ß°ßµÈ º´¼ÒÀÇ ÀÚ¼¼ÇÑ Æò°¡¸¦ ¸ñÀûÀ¸·Î °³¹ßµÇ¾ú½À´Ï´Ù. ÀÏ´Ü ¾Ï Àǽɺ´¼Ò°¡ ¹ß°ßµÇ¸é IEE·Î º¸´Ù ÀÚ¼¼È÷ characterizationÀ» ÇÒ ¼ö ÀÖ½À´Ï´Ù. ±×·¯³ª white light endoscopy ´ë½Å IEE¸¦ ½á¼­ ¾Ï¹ß°ßÀ²ÀÌ ³ô¾ÆÁö´ÂÁö´Â ¸íÈ®ÇÏÁö ¾Ê½À´Ï´Ù. NBI³ª i-scanÀÌ ½Äµµ¿¡¼­ squamous cancer/dysplasia ¹ß°ß¿¡ µµ¿òÀÌ µÈ´Ù´Â ±Ù°Å´Â ÀÖÀ¸³ª, À§¿¡¼­ ¾ÏÁø´ÜÀ² Áõ°¡¸¦ °¡Á®¿Â´Ù°í À̾߱âÇϱâ´Â ¾î·Æ½À´Ï´Ù. ³»½Ã°æÀ» ÇϽô ¿©·¯ ¼±»ý´Ôµé²²¼­´Â white light endoscopy¿¡ ÁýÁßÇÏ´Â °ÍÀÌ ÁÁÀ» °Í °°½À´Ï´Ù."

IEE´Â »ö¼Ò³»½Ã°æÀ» ´ëüÇÏ´Â ¸ñÀûÀ¸·Î °³¹ßµÈ °ÍÀÔ´Ï´Ù. White light endoscopy¿¡¼­ ¾ÏÀ̳ª ¼±Á¾ÀÌ ¹ß°ßµÇ¸é indigo carmineÀ» ºÐ¹«ÇÏ°í °üÂûÇÕ´Ï´Ù. ¹°·Ð »ó´çÈ÷ µµ¿òÀÌ µË´Ï´Ù. ±×·¸´Ù¸é white light endoscopy¿¡¼­ Ưº°ÇÑ ÀÌ»óÀÌ ¾ø¾ú´ø °æ¿ì indigo carmineÀ» ºÐ¹«ÇÏ¸é ¾î¶³±î¿ä? Indigo carmineÀÌ ¾Ï Áø´ÜÀ² Çâ»ó¿¡ µµ¿òÀÌ µÈ´Ù¸é IEEµµ ±×·² °¡´É¼ºÀÌ ³ôÀ» °ÍÀÔ´Ï´Ù. Indigo carmineÀÌ ¾Ï Áø´ÜÀ² Çâ»ó¿¡ µµ¿òµÇÁö ¾Ê´Â´Ù¸é IEEµµ ±×·¸Áö ¾ÊÀ» °¡´É¼ºÀÌ ³ôÀ» °ÍÀÔ´Ï´Ù.

ÀϺ»ÀÇ ¸î¸î ³»½Ã°æ½Ç¿¡¼­´Â »óºÎÀ§Àå°ü ³»½Ã°æ µµÁß routineÀ¸·Î indigo carmineÀ» »Ñ¸°´Ù°í ÇÕ´Ï´Ù. ±×·¯³ª routine chromoendoscopy°¡ µµ¿òÀÌ µÈ´Ù´Â Áõ°Å´Â °ÅÀÇ ¾ø½À´Ï´Ù. ¿À·¡ Àü Á¦°¡ ÇϺÎÀ§Àå°ü°ú »óºÎÀ§Àå°ü¿¡ ´ëÇÏ¿© °¢°¢ ¿¬±¸ÇÑ ¹Ù ÀÖ½À´Ï´Ù. ÇϺΠÀ§Àå°ü¿¡¼­´Â ±×³ª¸¶ tiny adenoma°¡ ¸î °³ ¹ß°ßµÇ¾ú½À´Ï´Ù. ±×·¯³ª »óºÎÀ§Àå°ü¿¡¼­´Â ÀüÇô µµ¿òµÇÁö ¾Ê´Â´Ù´Â °á°ú¸¦ ¾ò¾ú½À´Ï´Ù.

¾ÆÁ÷±îÁö´Â white light endoscopy·Î ÀÚ¼¼È÷ º¸´Â °ÍÀÌ ÃÖ¼±À̶ó°í »ý°¢ÇÕ´Ï´Ù. ³ª¹«º¸´Ù ½£À» º¸´Â °ÍÀÌ Áß¿äÇϱ⠶§¹®ÀÏ °ÍÀÔ´Ï´Ù.

Am J Gastroenterol 2003

´ëÇѼÒÈ­±â³»½Ã°æÇÐȸÁö 2005

±×·¸½À´Ï´Ù. ½Å±â¼úÀº ²À ÇÊ¿äÇÑ °æ¿ì°¡ ÀÖ´Â °ÍÀÔ´Ï´Ù. Æò¼Ò¿¡´Â º¸Åë ±â¼ú·Î Á·ÇÕ´Ï´Ù. White light endoscopy·Î õõÈ÷ ¿À·¡ º¸¸é ¾Ï ¹ß°ß¿¡ ¹®Á¦°¡ ¾ø½À´Ï´Ù. »¡¸® ´ëÃ溸´Â °ÍÀÌ ¹®Á¦ÀÌÁö white light endoscopy°¡ ¹®Á¦´Â ¾Æ´Õ´Ï´Ù. ¿À·¡ ÀÚ¼¼È÷ º¸¸é Áø´ÜÀ²ÀÌ ¿Ã¶ó°¡´Â °ÍÀÌÁö ½Å±â¼úÀ» ½è´Ù°í Áø´ÜÀ²ÀÌ ¿Ã¶ó°¡´Â °ÍÀº ¾Æ´Õ´Ï´Ù. Àû¾îµµ 2020³â ÇöÀç±îÁö´Â ±×·¸½À´Ï´Ù.

[2021-6-18] ÀÓ»ó°­»ç ¼±»ý´Ô°ú ÇÔ²² IEE¿¡ ´ëÇÑ Åä·ÐÀ» ÇÏ¿´½À´Ï´Ù.


[2024-7-6] IDEN Ư°­¿¡¼­ Á¦½ÃµÈ °á·ÐÀÔ´Ï´Ù. ¼øõÇâ´ëÇÐ ±³¼ö´Ô.

New Image Enhanced Endoscopy
LCILCI is superior to WLI in detecting adenoma and SSL.
LCI is not infereior to NBI in detecting SSL.
LCI may help predict mucosal healing in UC.
RDIRDI enhances visibility of bleeding points, aiding endoscopic hemostasis.
RDI may help assess UC severity.
TXITXI enhances lesion visibility compared to WLI, improving diagnostic accuracy.
TXI improves ADR and PDR over WLI, especially for small lesions.


[References]

1) EndoTODAY È®´ë³»½Ã°æ

2) 2021-9-4. Àü³²´ë ¸í´ë¼º ±³¼ö´Ô °­ÀÇ. IEE and SSL

© ÀÏ¿ø³»½Ã°æ±³½Ç ¹Ù¸¥³»½Ã°æ¿¬±¸¼Ò ÀÌÁØÇà. EndoTODAY Endoscopy Learning Center. Lee Jun Haeng.